weight of Ferrocene 0.225 g Moles of Ferrocene 1.21 * 10 ^ -3 mol Initial volume of acetic anhydride 1.00 mL Moles of acetic anhydride 0.0110 mol Initial volume of phosphoric acid 0.300 mL Initial moles of phosphoric acid 5.15*10^-3 mol Limiting reagent Ferrocene Moles of limiting reagent 1.21*10^-3 mol Final weight of product 0.288g Theoretical yield 29.49 Moles of product 3.73*10^-4 mol % yield 97% melting point (°C) of product 128°C -131°C Calculations: Moles of Ferrocene 0.225g * mol
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50V 4. Convert the following masses into moles. A. 135 grams of Aluminum. Molar Mass of Aluminum = 26.98g/mol # moles Al = 135g x 1 mole = 5.0 moles 26.98g B. 1.0 grams of Copper. Copper Molar Mass = 63.55g/mol # moles Cu = 1.0g x 1 mole = 0.016 moles 63.55g 5. Convert the following moles into masses. A. 0.160 moles of Magnesium. Mg Molar Mass = 24.31g/mol
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= 65 + 32 + (16 x 4) =161 * Mass of water in 1 mole of ZnSO4 = Mr ZnSO4 x Mass of water Mass of anhydrous salt * Mas of water in 1 mole of ZnSO4 = 161 x 5.79 = 129.29 7.21 * Moles of water in 1 mole of ZnSO4 = Mass of water in one mole of ZnSO4
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grams/mole‚ what’s the molecular formula? 3. What’s the empirical formula of a molecule containing 18.7% lithium‚ 16.3% carbon‚ and 65.0% oxygen? 4. If the molar mass of the compound in problem 3 is 73.8 grams/mole‚ what’s the molecular formula? Write the molecular formulas of the following compounds: 5. A compound with an empirical formula of C2OH4 and a molar mass of 88 grams per mole. 6. A compound with an empirical formula of C4H4O and a molar mass of 136 grams per mole.
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The senses and understanding when mammals[] the senses. Adopt the mammals different senses make it interacts with what is happening in the surrounding environment. The main and senses in mammals are: 1. smell 2. Tastefully decorated 3. Hearing 4. eyesight 5. The touchscreen. These senses does not equal in all species of mammals‚ and that some of these animals may not have all the senses. Smell sense of smell of more than senses the importance in most species of mammals. Species cubicle cavity large
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the atoms in a compound o With knowledge of the mass of each individual atom‚ the percentage composition by mass can be determined The Mole (mol) o A counting unit‚ one mole refers to 6.02 x 1023 particles of any given substance o Known as Avogadro’s Constant and given the symbol NA Molar Mass o The molar mass of a substance is the mass of one mole of a particular substance Mass of one particle x 6.02 x 1023 o Coincidentally‚ the molar mass of a substance has the same numerical value
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Mass/Mole Problems 1. Determine the molar masses of the following compounds: a. dinitrogen pentoxide c. sodium carbonate b. ammonium phosphate 2. Calculate the number of atoms in 20.0 grams of calcium. Road map: grams ( mols( atoms 20.0 g Ca x 1 mol Ca x 6.02 x 1023 atoms Ca 1 40.01 g Ca 1 mol Ca atoms 3. What is the mass of 6.20 moles of potassium
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is trapped inside the hydrated solid structure is called water of crystallization or water of hydration. A salt with associated water of crystallization is known as a hydrate. The formula of a hydrated salt is written as the number of moles of water present in one mole of crystalline structure. Deliquescent materials are substances that absorb water from the atmosphere and eventually become hydrated. These materials‚ usually salts‚ tend to have a high affinity for water. During this process‚ the
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Hydrochloric acid ---- Calcium Chloride + water + carbon dioxide. CaCO3 + 2HCl ---- CaCl +H2O + CO2 Measurements and Variables: The variables I have chosen to change is strength of the hydrochloric acid which will be 1 mole‚ 0.7 mole‚ 0.5 mole‚ 0.3 mole and 0.1 mole some variable I will not be using are temperature‚ mass‚ density. The measurements I will be using are time (s) and volume in (cm3). Fair Test: To make sure this a fair test I will get exact amounts of the Hydrochloric acid
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but also the number of moles of particles. ________true__________ 5. The mass of each reactant and product is related to its coefficient in the balanced chemical equation for the reaction by its molar mass. Complete the table below‚ using information represented in the chemical equation for the combustion of methanol‚ an alcohol. methanol oxygen → carbon dioxide water 2CH3OH(l) 3O2 (g) → 2CO2(g) 4H2O(g) Substance Molar Mass (g/mol) Number of Molecules Number of Moles (mol) Mass (g) 6.
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